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  • Interview with Ronald Bradford about MySQL Connect

    - by Keith Larson
    Ronald Bradford,  an Oracle ACE Director has been busy working with  database consulting, book writing (EffectiveMySQL) while traveling and speaking around the world in support of MySQL. I was able to take some of his time to get an interview on this thoughts about theMySQL Connect conference. Keith Larson: What where your thoughts when you heard that Oracle was going to provide the community the MySQL Conference ?Ronald Bradford: Oracle has already been providing various different local community events including OTN Tech Days and  MySQL community days. These are great for local regions both in the US and abroad.  In previous years there has been an increase of content at Oracle Open World, however that benefits the Oracle community far more then the MySQL community.  It is good to see that Oracle is realizing the benefit in providing a large scale dedicated event for the MySQL community that includes speakers from the MySQL development teams, invested companies in the ecosystem and other community evangelists.I fully expect a successful event and look forward to hopefully seeing MySQL Connect at the upcoming Brazil and Japan OOW conferences and perhaps an event on the East Coast.Keith Larson: Since you are part of the content committee, what did you think of the submissions that were received during call for papers?Ronald Bradford: There was a large number of quality submissions to the number of available presentation sessions. As with the previous years as a committee member for the annual MySQL conference, there is always a large variety of common cornerstone MySQL features as well as new products and upcoming companies sharing their MySQL experiences. All of the usual major players in the ecosystem will in presenting at MySQL Connect including Facebook, Twitter, Yahoo, Continuent, Percona, Tokutek, Sphinx and Amazon to name a few.  This is ensuring the event will have a large number of quality speakers and a difficult time in choosing what to attend. Keith Larson: What sessions do you look forwarding to attending? Ronald Bradford: As with most quality conferences you can only be in one place at one time, so with multiple tracks per session it is always difficult to decide. The continued work and success with MySQL Cluster, and with a number of sessions I am sure will be popular. The features that interest me the most are around the optimizer, where there are several sessions on new features, and on the importance of backups. There are three presentations in this area to choose from.Keith Larson: Are you going to cover any of the content in your books at your MySQL Connect sessions?Ronald Bradford: I will be giving two presentations at MySQL Connect. The first will include the techniques available for creating better indexes where I will be touching on some aspects of the first Effective MySQL book on Optimizing SQL Statements.  In my second presentation from experiences of managing 500+ AWS MySQL instances, I will be touching on areas including SQL tuning, backup and recovery and scale out with replication.   These are the key topics of the initial books in the Effective MySQL series that focus on performance, scalability and business continuity.  The books however cover a far greater amount of detail then can be presented in a 1 hour session. Keith Larson: What features of MySQL 5.6 do you look forward to the most ?Ronald Bradford: I am very impressed with the optimizer trace feature. The ability to see exposed information is invaluable not just for MySQL 5.6, but to also apply information discerned for optimizing SQL statements in earlier versions of MySQL.  Not everybody understands that it is easy to deploy a MySQL 5.6 slave into an existing topology running an older version if MySQL for evaluation of many new features.  You can use the new mysqlbinlog streaming feature for duplicating master binary logs on an older version with a MySQL 5.6 slave.  The improvements in instrumentation in the Performance Schema are exciting.   However, as with my upcoming Replication Techniques in Depth title, that will be available for sale at MySQL Connect, there are numerous replication features, some long overdue with provide significant management benefits. Crash Save Slaves, Global transaction Identifiers (GTID)  and checksums just to mention a few.Keith Larson: You have been to numerous conferences, what would you recommend for people at the conference? Ronald Bradford: Make the time to meet and introduce yourself to the speakers that cover the topics that most interest you. The MySQL ecosystem has a very strong community.  The relationships you build with presenters, developers and architects in MySQL can be invaluable, however they are created over time. Get to know these people, interact with them over time.  This is the opportunity to learn more then just the content from a 1 hour session. Keith Larson: Any additional tips to handling the long hours ? Ronald Bradford: Conferences can be hard, especially with all the post event drinking.  This is a two day event and I am sure will include additional events on Friday and Saturday night so come well prepared, and leave work behind. Take the time to learn something new.   You can always catchup on sleep later. Keith Larson: Thank you so much for taking some time to do this I look forward to seeing you at the MySQL Connect conference.  Please stay tuned here for more updates on MySQL. 

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  • How does I/O work for large graph databases?

    - by tjb1982
    I should preface this by saying that I'm mostly a front end web developer, trained as a musician, but over the past few years I've been getting more and more into computer science. So one idea I have as a fun toy project to learn about data structures and C programming was to design and implement my own very simple database that would manage an adjacency list of posts. I don't want SQL (maybe I'll do my own query language? I'm just having fun). It should support ACID. It should be capable of storing 1TB let's say. So with that, I was trying to think of how a database even stores data, without regard to data structures necessarily. I'm working on linux, and I've read that in that world "everything is a file," including hardware (like /dev/*), so I think that that obviously has to apply to a database, too, and it clearly does--whether it's MySQL or PostgreSQL or Neo4j, the database itself is a collection of files you can see in the filesystem. That said, there would come a point in scale where loading the entire database into primary memory just wouldn't work, so it doesn't make sense to design it with that mindset (I assume). However, reading from secondary memory would be much slower and regardless some portion of the database has to be in primary memory in order for you to be able to do anything with it. I read this post: Why use a database instead of just saving your data to disk? And I found it difficult to understand how other databases, like SQLite or Neo4j, read and write from secondary memory and are still very fast (faster, it would seem, than simply writing files to the filesystem as the above question suggests). It seems the key is indexing. But even indexes need to be stored in secondary memory. They are inherently smaller than the database itself, but indexes in a very large database might be prohibitively large, too. So my question is how is I/O generally done with large databases like the one I described above that would be at least 1TB storing a big adjacency list? If indexing is more or less the answer, how exactly does indexing work--what data structures should be involved?

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  • Problem with apt-get [install, purge, autoremove, upgrade]

    - by Ark
    I am trying to install openvpn using apt-get, but I get an error during the process [As far as I understand the issue is with unattended-updates, which I could not upgrade due to apt-get porblem :/]. I cannot upgrade, install, autoremove or purge anything else [which I need to do since /boot is full. For upgrading I did update before trying].... Trace [on sudo apt-get autoremove]: 0 upgraded, 0 newly installed, 79 to remove and 421 not upgraded. 35 not fully installed or removed. Need to get 24.1 kB of archives. After this operation, 140 MB disk space will be freed. Do you want to continue [Y/n]? y Get:1 http://us.archive.ubuntu.com/ubuntu/ oneiric/main unattended-upgrades all 0.73ubuntu1 [24.1 kB] Fetched 24.1 kB in 0s (31.2 kB/s) Preconfiguring packages ... (Reading database ... 287206 files and directories currently installed.) Removing flashplugin-downloader:i386 ... Removing libasound2-plugins:i386 ... Removing libpulse0:i386 ... Removing libsndfile1:i386 ... Removing libvorbisenc2:i386 ... Removing libvorbis0a:i386 ... Processing triggers for libc-bin ... ldconfig deferred processing now taking place (Reading database ... 287174 files and directories currently installed.) Preparing to replace unattended-upgrades 0.73ubuntu1 (using .../unattended-upgrades_0.73ubuntu1_all.deb) ... Checking for running unattended-upgrades: Traceback (most recent call last): File "/usr/share/unattended-upgrades/unattended-upgrade-shutdown", line 27, in <module> import apt_pkg ImportError: No module named apt_pkg invoke-rc.d: initscript unattended-upgrades, action "stop" failed. dpkg: warning: subprocess old pre-removal script returned error exit status 1 dpkg - trying script from the new package instead ... Checking for running unattended-upgrades: Traceback (most recent call last): File "/usr/share/unattended-upgrades/unattended-upgrade-shutdown", line 27, in <module> import apt_pkg ImportError: No module named apt_pkg invoke-rc.d: initscript unattended-upgrades, action "stop" failed. dpkg: error processing /var/cache/apt/archives/unattended-upgrades_0.73ubuntu1_all.deb (--unpack): subprocess new pre-removal script returned error exit status 1 update-rc.d: warning: unattended-upgrades start runlevel arguments (2 3 4 5) do not match LSB Default-Start values (none) update-rc.d: warning: unattended-upgrades stop runlevel arguments (0 1 6) do not match LSB Default-Stop values (0 6) Checking for running unattended-upgrades: Traceback (most recent call last): File "/usr/share/unattended-upgrades/unattended-upgrade-shutdown", line 27, in <module> import apt_pkg ImportError: No module named apt_pkg invoke-rc.d: initscript unattended-upgrades, action "start" failed. dpkg: error while cleaning up: subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: /var/cache/apt/archives/unattended-upgrades_0.73ubuntu1_all.deb E: Sub-process /usr/bin/dpkg returned an error code (1) Maybe I missed something basic, but I would appreciate pointers on solving the issue. Thanks

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  • apt-get install is not able to access /etc

    - by HorusKol
    I put together an ubuntu 12.04 server a couple of weeks ago and everything seemed fine until this morning. Suddenly, I'm having trouble installing new packages - at first I thought there was something wrong with tinyproxy and so I tried installing squid instead. However, I get similar results: Starting tinyproxy: tinyproxy: Could not open config file "/etc/tinyproxy.conf".\ ... /var/lib/dpkg/info/squid3.postinst: 1: /var/lib/dpkg/info/squid3.postinst: cannot open /etc/squid3/squid.conf: No such file It seems that apt-get is not creating the configuration files needed for these programs. I haven't modified any configuration or user groups since the last successful update/install of packages. /etc is present, and is populated with a nice healthy tree of configuration files. It is owned and grouped to root, and has the properties drwxr-xr-x - all the files and folders inside seem to be fine to, as far as I can tell. I've even been able to edit/save a couple as sudo. Full output from installing tinyproxy: Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: tinyproxy 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/61.6 kB of archives. After this operation, 201 kB of additional disk space will be used. Selecting previously unselected package tinyproxy. (Reading database ... 58916 files and directories currently installed.) Unpacking tinyproxy (from .../tinyproxy_1.8.3-1_amd64.deb) ... Processing triggers for ureadahead ... Processing triggers for man-db ... Setting up tinyproxy (1.8.3-1) ... Starting tinyproxy: tinyproxy: Could not open config file "/etc/tinyproxy.conf". invoke-rc.d: initscript tinyproxy, action "start" failed. dpkg: error processing tinyproxy (--configure): subprocess installed post-installation script returned error exit status 70 Errors were encountered while processing: tinyproxy E: Sub-process /usr/bin/dpkg returned an error code (1) Result of strace after installation: 18467 open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 18467 open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3 18467 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\200\30\2\0\0\0\0\0"..., 832) = 832 18467 open("/etc/tinyproxy.conf", O_RDONLY) = -1 ENOENT (No such file or directory)

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  • Mysql-server-5.5 broken after update

    - by WalrusTusks
    Using Ubuntu 12.04, desktop, I had LAMP installed on my computer, and was using it as a server. However, after doing the upgrades one day, apt-get throws an error that mysql-server can't be configured, as it depends on another package: jay@rumbles:~$ sudo apt-get dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these. The following packages have unmet dependencies: mysql-server-5.5 : Depends: mysql-server-core-5.5 (= 5.5.22-0ubuntu1) but 5.5.24-0ubuntu0.12.04.1 is installed E: Unmet dependencies. Try using -f ` jay@rumbles:~$ sudo apt-get install -f Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following extra packages will be installed: mysql-server-5.5 Suggested packages: tinyca mailx The following packages will be upgraded: mysql-server-5.5 1 upgraded, 0 newly installed, 0 to remove and 35 not upgraded. 2 not fully installed or removed. Need to get 0 B/8,821 kB of archives. After this operation, 2,048 B of additional disk space will be used. Do you want to continue [Y/n]? y dpkg: dependency problems prevent configuration of mysql-server-5.5: mysql-server-5.5 depends on mysql-server-core-5.5 (= 5.5.22-0ubuntu1); however: Version of mysql-server-core-5.5 on system is 5.5.24-0ubuntu0.12.04.1. dpkg: error processing mysql-server-5.5 (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of mysql-server: mysql-server depends on mysql-server-5.5; however: No apport report written because the error message indicates its a followup error from a previous failure. No apport report written because the error message indicates its a followup error from a previous failure. Package mysql-server-5.5 is not configured yet. dpkg: error processing mysql-server (--configure): dependency problems - leaving unconfigured Errors were encountered while processing: mysql-server-5.5 mysql-server E: Sub-process /usr/bin/dpkg returned an error code (1) How can I fix this?

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  • Advice on designing a robust program to handle a large library of meta-information & programs

    - by Sam Bryant
    So this might be overly vague, but here it is anyway I'm not really looking for a specific answer, but rather general design principles or direction towards resources that deal with problems like this. It's one of my first large-scale applications, and I would like to do it right. Brief Explanation My basic problem is that I have to write an application that handles a large library of meta-data, can easily modify the meta-data on-the-fly, is robust with respect to crashing, and is very efficient. (Sorta like the design parameters of iTunes, although sometimes iTunes performs more poorly than I would like). If you don't want to read the details, you can skip the rest Long Explanation Specifically I am writing a program that creates a library of image files and meta-data about these files. There is a list of tags that may or may not apply to each image. The program needs to be able to add new images, new tags, assign tags to images, and detect duplicate images, all while operating. The program contains an image Viewer which has tagging operations. The idea is that if a given image A is viewed while the library has tags T1, T2, and T3, then that image will have boolean flags for each of those tags (depending on whether the user tagged that image while it was open in the Viewer). However, prior to being viewed in the Viewer, image A would have no value for tags T1, T2, and T3. Instead it would have a "dirty" flag indicating that it is unknown whether or not A has these tags or not. The program can introduce new tags at any time (which would automatically set all images to "dirty" with respect to this new tag) This program must be fast. It must be easily able to pull up a list of images with or without a certain tag as well as images which are "dirty" with respect to a tag. It has to be crash-safe, in that if it suddenly crashes, all of the tagging information done in that session is not lost (though perhaps it's okay to loose some of it) Finally, it has to work with a lot of images (10,000) I am a fairly experienced programmer, but I have never tried to write a program with such demanding needs and I have never worked with databases. With respect to the meta-data storage, there seem to be a few design choices: Choice 1: Invidual meta-data vs centralized meta-data Individual Meta-Data: have a separate meta-data file for each image. This way, as soon as you change the meta-data for an image, it can be written to the hard disk, without having to rewrite the information for all of the other images. Centralized Meta-Data: Have a single file to hold the meta-data for every file. This would probably require meta-data writes in intervals as opposed to after every change. The benefit here is that you could keep a centralized list of all images with a given tag, ect, making the task of pulling up all images with a given tag very efficient

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  • Video stutter when using external drive

    - by psion
    When using boxee to play video files off of an external western digital 1TB drive formatted NTFS, I notice a slight stutter in the video every 5-10 seconds. When using mplayer, it doesn't stutter as often, but it still stutters occasionally. If I play the video off of the local sata drive, it plays fine even in boxee. I use this computer as my HTPC and I just switched from windows to linux on it. In windows, I never had any sort of stutter playing movies from the drive. I am using the latest intel graphics drivers (for the intel GMA 950) root@eee-htpc:/home/htpc# grep wd /etc/mtab /dev/sdb1 /mnt/wd2 fuseblk rw,nosuid,nodev,allow_other,blksize=512 0 0 I notice that despite trying to use ntfs or ntfs-3g, ubuntu uses ntfs-fuse which I've heard is slower. /dev/sdb1: Timing buffered disk reads: 80 MB in 3.07 seconds = 26.08 MB/sec root@eee-htpc:/mnt/wd2# dd if=/dev/zero of=./120mb bs=1024 count=120000 root@eee-htpc:/mnt/wd2# time mv ./120mb /home/htpc real 0m2.095s user 0m0.016s sys 0m0.736s Even though fuse has a reputation for being slow, it should easily be fast enough for playing standard definition video files. So why the video stutter? edit: The issue seems to be overhead cpu usage from either playing off of a usb device or ntfs/fuse. Watching CPU usage with top, local files use 10-40% CPU. Watching the same video on the external formatted ntfs, it spikes to 170% (over 100% because of hyperthreading). To me it seems like it must be overhead from the fuse driver, though I don't know if it has more or less overhead than ntfs-3g. It's a EEEBox B202 that has an atom 270, so not exactly the most powerful out there. edit2: I believe the solution would be to use non-fuse drivers or different fuse drivers. so far I have not been able to. edit3: I've probably edited this more times than I should, but as an update I have upgraded ntfs drivers to ntfs-3g 2010.8.8 external FUSE 28 - Third Generation NTFS Driver using the following PPA - ppa:x3lectric/team-iquik-releases. When first opening a video file in boxee that's on ntfs there's still the same amount of lag. After a few minutes of video, the lag seems to go away and the cpu usage comes down to 10-40%. Every so often though, it begins to stutter again. Also, if I skip ahead/back in the file, it begins to stutter a lot.

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  • View Images and Videos in 3D in Firefox

    - by Asian Angel
    Different websites have their own format for viewing images and videos, but may not be a lot of fun to use. The Cooliris extension for Firefox lets you view those same images and videos in a dynamic 3D format. Before For our example we conducted a search for nature photos at Flickr. You could view them in a static format or even as a slideshow but what about something more dynamic looking? After As soon as the extension has finished installing, you will notice a new toolbar button used for launching the Cooliris tab. When you launch the Cooliris tab you will have an expandable menu system in the upper left corner. A speed dial setup in the center. And a small toolbar in the lower right corner Before going further you should check and make any desired adjustments in the preferences to enhance your viewing experience. In the upper right corner you can start your search by selecting from the available sources. The same search for nature images is more focused and clean looking this time. Clicking on an image will bring it forward and enlarge it. You can use the slider tool at the bottom of the tab to browser left or right through the images and videos. And when you find one that interests you, click on the popout button to open it in a new tab. Conclusion The Cooliris extension makes viewing images and videos fun and interactive with its’ 3D style format. Links Download the Cooliris extension (Mozilla Add-ons) Download Cooliris for Firefox, Internet Explorer, Safari (Mac Only), & Chrome Similar Articles Productive Geek Tips Make Firefox Display Large Images Full SizeInstalling Windows Media Player Plugin for FirefoxStop YouTube Videos from Automatically Playing in FirefoxShare Text & Images the Easy Way with JustPaste.itEasily View Source of Included Files in Firefox TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips VMware Workstation 7 Acronis Online Backup DVDFab 6 Revo Uninstaller Pro FetchMp3 Can Download Videos & Convert Them to Mp3 Use Flixtime To Create Video Slideshows Creating a Password Reset Disk in Windows Bypass Waiting Time On Customer Service Calls With Lucyphone MELTUP – "The Beginning Of US Currency Crisis And Hyperinflation" Enable or Disable the Task Manager Using TaskMgrED

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  • problem with wireless usb keyboard

    - by Sasha
    I have a problem with wireless keyboard. Problem is: On log, kern.log, messages and syslog is only this line. Every second is 50 lines with such message. Oct 1 08:14:12 wwserver kernel: [ 1447.978908] usb 7-1.3: input irq status -75 received Because these messages is disk full. For this I have to delete log files. Please for help. kern.log file: Oct 1 08:13:53 wwserver kernel: [ 1428.820057] usb 7-1: new full speed USB device using uhci_hcd and address 3 Oct 1 08:13:53 wwserver kernel: [ 1428.977383] usb 7-1: configuration #1 chosen from 1 choice Oct 1 08:13:53 wwserver kernel: [ 1428.980919] hub 7-1:1.0: USB hub found Oct 1 08:13:53 wwserver kernel: [ 1428.982288] hub 7-1:1.0: 4 ports detected Oct 1 08:13:53 wwserver kernel: [ 1429.261317] usb 7-1.3: new full speed USB device using uhci_hcd and address 4 Oct 1 08:13:58 wwserver kernel: [ 1434.408160] usb 7-1.3: configuration #1 chosen from 1 choice Oct 1 08:13:59 wwserver kernel: [ 1434.421484] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1d.2/usb7/7-1/7-1.3/7-1.3:1.0/input/input5 Oct 1 08:13:59 wwserver kernel: [ 1434.421585] generic-usb 0003:046D:C52B.0002: input,hidraw1: USB HID v1.11 Keyboard [Logitech USB Receiver] on usb-0000:00:1d.2-1.3/input0 Oct 1 08:13:59 wwserver kernel: [ 1434.433751] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1d.2/usb7/7-1/7-1.3/7-1.3:1.1/input/input6 Oct 1 08:13:59 wwserver kernel: [ 1434.433933] generic-usb 0003:046D:C52B.0003: input,hiddev96,hidraw2: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-0000:00:1d.2-1.3/input1 Oct 1 08:13:59 wwserver kernel: [ 1434.450210] generic-usb 0003:046D:C52B.0004: hiddev97,hidraw3: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:1d.2-1.3/input2 Oct 1 08:13:59 wwserver kernel: [ 1434.455416] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1d.2/usb7/7-1/7-1.3/7-1.3:1.3/input/input7 Oct 1 08:13:59 wwserver kernel: [ 1434.455545] generic-usb 0003:046D:C52B.0005: input,hidraw4: USB HID v1.10 Mouse [Logitech USB Receiver] on usb-0000:00:1d.2-1.3/input3 Oct 1 08:14:12 wwserver kernel: [ 1447.964916] usb 7-1.3: input irq status -75 received Oct 1 08:14:12 wwserver kernel: [ 1447.966907] usb 7-1.3: input irq status -75 received Oct 1 08:14:12 wwserver kernel: [ 1447.968906] usb 7-1.3: input irq status -75 received Oct 1 08:14:12 wwserver kernel: [ 1447.970908] usb 7-1.3: input irq status -75 received Oct 1 08:14:12 wwserver kernel: [ 1447.972907] usb 7-1.3: input irq status -75 received Oct 1 08:14:12 wwserver kernel: [ 1447.974907] usb 7-1.3: input irq status -75 received Oct 1 08:14:12 wwserver kernel: [ 1447.976908] usb 7-1.3: input irq status -75 received Oct 1 08:14:12 wwserver kernel: [ 1447.978908] usb 7-1.3: input irq status -75 received

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  • VirtualBox 4.2.14 is now available

    - by user12611829
    The VirtualBox development team has just released version 4.2.14, and it is now available for download. This is a maintenance release for version 4.2 and contains quite a few fixes. Here is the list from the official Changelog. VMM: another TLB invalidation fix for non-present pages VMM: fixed a performance regression (4.2.8 regression; bug #11674) GUI: fixed a crash on shutdown GUI: prevent stuck keys under certain conditions on Windows hosts (bugs #2613, #6171) VRDP: fixed a rare crash on the guest screen resize VRDP: allow to change VRDP parameters (including enabling/disabling the server) if the VM is paused USB: fixed passing through devices on Mac OS X host to a VM with 2 or more virtual CPUs (bug #7462) USB: fixed hang during isochronous transfer with certain devices (4.1 regression; Windows hosts only; bug #11839) USB: properly handle orphaned URBs (bug #11207) BIOS: fixed function for returning the PCI interrupt routing table (fixes NetWare 6.x guests) BIOS: don't use the ENTER / LEAVE instructions in the BIOS as these don't work in the real mode as set up by certain guests (e.g. Plan 9 and QNX 4) DMI: allow to configure DmiChassisType (bug #11832) Storage: fixed lost writes if iSCSI is used with snapshots and asynchronous I/O (bug #11479) Storage: fixed accessing certain VHDX images created by Windows 8 (bug #11502) Storage: fixed hang when creating a snapshot using Parallels disk images (bug #9617) 3D: seamless + 3D fixes (bug #11723) 3D: version 4.2.12 was not able to read saved states of older versions under certain conditions (bug #11718) Main/Properties: don't create a guest property for non-running VMs if the property does not exist and is about to be removed (bug #11765) Main/Properties: don't forget to make new guest properties persistent after the VM was terminated (bug #11719) Main/Display: don't lose seamless regions during screen resize Main/OVF: don't crash during import if the client forgot to call Appliance::interpret() (bug #10845) Main/OVF: don't create invalid appliances by stripping the file name if the VM name is very long (bug #11814) Main/OVF: don't fail if the appliance contains multiple file references (bug #10689) Main/Metrics: fixed Solaris file descriptor leak Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes VBoxManage: fixed setting the parent UUID on diff images using sethdparentuuid Linux hosts: work around for not crashing as a result of automatic NUMA balancing which was introduced in Linux 3.8 (bug #11610) Windows installer: force the installation of the public certificate in background (i.e. completely prevent user interaction) if the --silent command line option is specified Windows Additions: fixed problems with partial install in the unattended case Windows Additions: fixed display glitch with the Start button in seamless mode for some themes Windows Additions: Seamless mode and auto-resize fixes Windows Additions: fixed trying to to retrieve new auto-logon credentials if current ones were not processed yet Windows Additions installer: added the /with_wddm switch to select the experimental WDDM driver by default Linux Additions: fixed setting own timed out and aborted texts in information label of the lightdm greeter Linux Additions: fixed compilation against Linux 3.2.0 Ubuntu kernels (4.2.12 regression as a side effect of the Debian kernel build fix; bug #11709) X11 Additions: reduced the CPU load of VBoxClient in drag'and'drop mode OS/2 Additions: made the mouse wheel work (bug #6793) Guest Additions: fixed problems copying and pasting between two guests on an X11 host (bug #11792) The full changelog can be found here. You can download binaries for Solaris, Linux, Windows and MacOS hosts at http://www.virtualbox.org/wiki/Downloads Technocrati Tags: Oracle Virtualization VirtualBox

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  • How to Achieve Real-Time Data Protection and Availabilty....For Real

    - by JoeMeeks
    There is a class of business and mission critical applications where downtime or data loss have substantial negative impact on revenue, customer service, reputation, cost, etc. Because the Oracle Database is used extensively to provide reliable performance and availability for this class of application, it also provides an integrated set of capabilities for real-time data protection and availability. Active Data Guard, depicted in the figure below, is the cornerstone for accomplishing these objectives because it provides the absolute best real-time data protection and availability for the Oracle Database. This is a bold statement, but it is supported by the facts. It isn’t so much that alternative solutions are bad, it’s just that their architectures prevent them from achieving the same levels of data protection, availability, simplicity, and asset utilization provided by Active Data Guard. Let’s explore further. Backups are the most popular method used to protect data and are an essential best practice for every database. Not surprisingly, Oracle Recovery Manager (RMAN) is one of the most commonly used features of the Oracle Database. But comparing Active Data Guard to backups is like comparing apples to motorcycles. Active Data Guard uses a hot (open read-only), synchronized copy of the production database to provide real-time data protection and HA. In contrast, a restore from backup takes time and often has many moving parts - people, processes, software and systems – that can create a level of uncertainty during an outage that critical applications can’t afford. This is why backups play a secondary role for your most critical databases by complementing real-time solutions that can provide both data protection and availability. Before Data Guard, enterprises used storage remote-mirroring for real-time data protection and availability. Remote-mirroring is a sophisticated storage technology promoted as a generic infrastructure solution that makes a simple promise – whatever is written to a primary volume will also be written to the mirrored volume at a remote site. Keeping this promise is also what causes data loss and downtime when the data written to primary volumes is corrupt – the same corruption is faithfully mirrored to the remote volume making both copies unusable. This happens because remote-mirroring is a generic process. It has no  intrinsic knowledge of Oracle data structures to enable advanced protection, nor can it perform independent Oracle validation BEFORE changes are applied to the remote copy. There is also nothing to prevent human error (e.g. a storage admin accidentally deleting critical files) from also impacting the remote mirrored copy. Remote-mirroring tricks users by creating a false impression that there are two separate copies of the Oracle Database. In truth; while remote-mirroring maintains two copies of the data on different volumes, both are part of a single closely coupled system. Not only will remote-mirroring propagate corruptions and administrative errors, but the changes applied to the mirrored volume are a result of the same Oracle code path that applied the change to the source volume. There is no isolation, either from a storage mirroring perspective or from an Oracle software perspective.  Bottom line, storage remote-mirroring lacks both the smarts and isolation level necessary to provide true data protection. Active Data Guard offers much more than storage remote-mirroring when your objective is protecting your enterprise from downtime and data loss. Like remote-mirroring, an Active Data Guard replica is an exact block for block copy of the primary. Unlike remote-mirroring, an Active Data Guard replica is NOT a tightly coupled copy of the source volumes - it is a completely independent Oracle Database. Active Data Guard’s inherent knowledge of Oracle data block and redo structures enables a separate Oracle Database using a different Oracle code path than the primary to use the full complement of Oracle data validation methods before changes are applied to the synchronized copy. These include: physical check sum, logical intra-block checking, lost write validation, and automatic block repair. The figure below illustrates the stark difference between the knowledge that remote-mirroring can discern from an Oracle data block and what Active Data Guard can discern. An Active Data Guard standby also provides a range of additional services enabled by the fact that it is a running Oracle Database - not just a mirrored copy of data files. An Active Data Guard standby database can be open read-only while it is synchronizing with the primary. This enables read-only workloads to be offloaded from the primary system and run on the active standby - boosting performance by utilizing all assets. An Active Data Guard standby can also be used to implement many types of system and database maintenance in rolling fashion. Maintenance and upgrades are first implemented on the standby while production runs unaffected at the primary. After the primary and standby are synchronized and all changes have been validated, the production workload is quickly switched to the standby. The only downtime is the time required for user connections to transfer from one system to the next. These capabilities further expand the expectations of availability offered by a data protection solution beyond what is possible to do using storage remote-mirroring. So don’t be fooled by appearances.  Storage remote-mirroring and Active Data Guard replication may look similar on the surface - but the devil is in the details. Only Active Data Guard has the smarts, the isolation, and the simplicity, to provide the best data protection and availability for the Oracle Database. Stay tuned for future blog posts that dive into the many differences between storage remote-mirroring and Active Data Guard along the dimensions of data protection, data availability, cost, asset utilization and return on investment. For additional information on Active Data Guard, see: Active Data Guard Technical White Paper Active Data Guard vs Storage Remote-Mirroring Active Data Guard Home Page on the Oracle Technology Network

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  • Infiniband: a highperformance network fabric - Part I

    - by Karoly Vegh
    Introduction:At the OpenWorld this year I managed to chat with interesting people again - one of them answering Infiniband deepdive questions with ease by coffee turned out to be one of Oracle's IB engineers, Ted Kim, who actually actively participates in the Infiniband Trade Association and integrates Oracle solutions with this highspeed network. This is why I love attending OOW. He granted me an hour of his time to talk about IB. This post is mostly based on that tech interview.Start of the actual post: Traditionally datatransfer between servers and storage elements happens in networks with up to 10 gigabit/seconds or in SANs with up to 8 gbps fiberchannel connections. Happens. Well, data rather trickles through.But nowadays data amounts grow well over the TeraByte order of magnitude, and multisocket/multicore/multithread Servers hunger data that these transfer technologies just can't deliver fast enough, causing all CPUs of this world do one thing at the same speed - waiting for data. And once again, I/O is the bottleneck in computing. FC and Ethernet can't keep up. We have half-TB SSDs, dozens of TB RAM to store data to be modified in, but can't transfer it. Can't backup fast enough, can't replicate fast enough, can't synchronize fast enough, can't load fast enough. The bad news is, everyone is used to this, like back in the '80s everyone was used to start compile jobs and go for a coffee. Or on vacation. The good news is, there's an alternative. Not so-called "bleeding-edge" 8gbps, but (as of now) 56. Not layers of overhead, but low latency. And it is available now. It has been for a while, actually. Welcome to the world of Infiniband. Short history:Infiniband was born as a result of joint efforts of HPAQ, IBM, Intel, Sun and Microsoft. They planned to implement a next-generation I/O fabric, in the 90s. In the 2000s Infiniband (from now on: IB) was quite popular in the high-performance computing field, powering most of the top500 supercomputers. Then in the middle of the decade, Oracle realized its potential and used it as an interconnect backbone for the first Database Machine, the first Exadata. Since then, IB has been booming, Oracle utilizes and supports it in a large set of its HW products, it is the backbone of the famous Engineered Systems: Exadata, SPARC SuperCluster, Exalogic, OVCA and even the new DB backup/recovery box. You can also use it to make servers talk highspeed IP to eachother, or to a ZFS Storage Appliance. Following Oracle's lead, even IBM has jumped the wagon, and leverages IB in its PureFlex systems, their first InfiniBand Machines.IB Structural Overview: If you want to use IB in your servers, the first thing you will need is PCI cards, in IB terms Host Channel Adapters, or HCAs. Just like NICs for Ethernet, or HBAs for FC. In these you plug an IB cable, going to an IB switch providing connection to other IB HCAs. Of course you're going to need drivers for those in your OS. Yes, these are long-available for Solaris and Linux. Now, what protocols can you talk over IB? There's a range of choices. See, IB isn't accepting package loss like Ethernet does, and hence doesn't need to rely on TCP/IP as a workaround for resends. That is, you still can run IP over IB (IPoIB), and that is used in various cases for control functionality, but the datatransfer can run over more efficient protocols - like native IB. About PCI connectivity: IB cards, as you see are fast. They bring low latency, which is just as important as their bandwidth. Current IB cards run at 56 gbit/s. That is slightly more than double of the capacity of a PCI Gen2 slot (of ~25 gbit/s). And IB cards are equipped usually with two ports - that is, altogether you'd need 112 gbit/s PCI slots, to be able to utilize FDR IB cards in an active-active fashion. PCI Gen3 slots provide you with around ~50gbps. This is why the most IB cards are configured in an active-standby way if both ports are used. Once again the PCI slot is the bottleneck. Anyway, the new Oracle servers are equipped with Gen3 PCI slots, an the new IB HCAs support those too. Oracle utilizes the QDR HCAs, running at 40gbp/s brutto, which translates to a 32gbp/s net traffic due to the 10:8 signal-to-data information ratio. Consolidation techniques: Technology never stops to evolve. Mellanox is working on the 100 gbps (EDR) version already, which will be optical, since signal technology doesn't allow EDR to be copper. Also, I hear you say "100gbps? I will never use/need that much". Are you sure? Have you considered consolidation scenarios, where (for example with Oracle Virtual Network) you could consolidate your platform to a high densitiy virtualized solution providing many virtual 10gbps interfaces through that 100gbps? Technology never stops to evolve. I still remember when a 10mbps network was impressively fast. Back in those days, 16MB of RAM was a lot. Now we usually run servers with around 100.000 times more RAM. If network infrastrucure speends could grow as fast as main memory capacities, we'd have a different landscape now :) You can utilize SRIOV as well for consolidation. That is, if you run LDoms (aka Oracle VM Server for SPARC) you do not have to add physical IB cards to all your guest LDoms, and you do not need to run VIO devices through the hypervisor either (avoiding overhead). You can enable SRIOV on those IB cards, which practically virtualizes the PCI bus, and you can dedicate Physical- and Virtual Functions of the virtualized HCAs as native, physical HW devices to your guests. See Raghuram's excellent post explaining SRIOV. SRIOV for IB is supported since LDoms 3.1.  This post is getting lengthier, so I will rename it to Part I, and continue it in a second post. 

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  • After 10 Years, MySQL Still the Right Choice for ScienceLogic's "Best Network Monitoring System on the Planet"

    - by Rebecca Hansen
    ScienceLogic has a pretty fantastic network monitoring appliance.  So good in fact that InfoWorld gave it their "2013 Best Network Monitoring System on the Planet" award.  Inside their "ultraflexible, ultrascalable, carrier-grade" enterprise appliance, ScienceLogic relies on MySQL and has since their start in 2003.  Check out some of the things they've been able to do with MySQL and their reasons for continuing to use MySQL in these highlights from our new MySQL ScienceLogic case study. Science Logic's larger customers use their appliance to monitor and manage  20,000+ devices, each of which generates a steady stream of data and a workload that is 85% write. On a large system, the MySQL database: Averages 8,000 queries every second or about 1 billion queries a day Can reach 175,000 tables and up to 20 million rows in a single table Is 2 terabytes on average and up to 6 terabytes "We told our customers they could add more and more devices. With MySQL, we haven't had any problems. When our customers have problems, we get calls. Not getting calls is a huge benefit." Matt Luebke, ScienceLogic Chief Software Architect.? ScienceLogic was approached by a number of Big Data / NoSQL vendors, but decided against using a NoSQL-only solution. Said Matt, "There are times when you really need SQL. NoSQL can't show me the top 10 users of CPU, or show me the bottom ten consumer of hard disk. That's why we weren't interested in changing and why we are very interested in MySQL 5.6. It's great that it can do relational and key-value using memcached." The ScienceLogic team is very cautious about putting only very stable technology into their product, and according to Matt, MySQL has been very stable: "We've been using MySQL for 10 years and we have never had any reliability problems. Ever." ScienceLogic now uses SSDs for their write-intensive appliance and that change alone has helped them achieve a 5x performance increase. Learn more>> ScienceLogic MySQL Case Study MySQL 5.6 InnoDB Compression options for better SSD performance Tuning MySQL 5.6 for Great Product Performance - on demand webinar Developer and DBA Guide to MySQL 5.6 white paper Guide to MySQL and NoSQL: The Best of Both Worlds white paper

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  • Did I lost my RAID again?

    - by BarsMonster
    Hi! A little history: 2 years ago I was really excited to find out that mdadm is so powerful so it even can reshape arrays so you can start with a smaller array and the grow it as you need. I've bought 3x1Tb drives and made RAID-5. It was fine for a year. Then I bought 2x more, and tried to reshape to RAID-6 out of 5 drives, and due to some mess with superblock versions, lost all content. Had to rebuild it from scratch, but 2Tb of data were gone. Yesterday I bought 2 more drives, and this time I had everything: properly built array, UPS. I've disabled write intent map, added 2 new drives as a spare and run a command to grow array to 7-disk. It started working, but speed was ridiculously slow, ~100kb/sec. AFter processing first 37Mb at such an amasing speed, one of old HDDs fails. I properly shutdown PC and disconnected failed drive. After bootup it appeared it recreated intent map as it was still in mdadm config, so I removed it from config and rebooted again. Now all I see is that all mdadm processes deadlocks, and don't do anything. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1937 root 20 0 12992 608 444 D 0 0.1 0:00.00 mdadm 2283 root 20 0 12992 852 704 D 0 0.1 0:00.01 mdadm 2287 root 20 0 0 0 0 D 0 0.0 0:00.01 md0_reshape 2288 root 18 -2 12992 820 676 D 0 0.1 0:00.01 mdadm And all I see in mdstat is: $ cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid6 sdb1[1] sdg1[4] sdf1[7] sde1[6] sdd1[0] sdc1[5] 2929683456 blocks super 1.2 level 6, 1024k chunk, algorithm 2 [7/6] [UU_UUUU] [>....................] reshape = 0.0% (37888/976561152) finish=567604147.2min speed=0K/sec I've already tried mdadm 2.6.7, 3.1.4 and 3.2 - nothing helps. Did I lost my data again? Any suggestions how can I make it work? OS is Ubuntu Server 10.04.2... PS. Needless to say that data is unaccessible - I cannot mount /dev/md0 as save the most valuable data. You can see my disappointment - the very specific thing I was excited about failed twice taking 5Tb of my data with it.

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  • Organizing Git repositories with common nested sub-modules

    - by André Caron
    I'm a big fan of Git sub-modules. I like to be able to track a dependency along with its version, so that you can roll-back to a previous version of your project and have the corresponding version of the dependency to build safely and cleanly. Moreover, it's easier to release our libraries as open source projects as the history for libraries is separate from that of the applications that depend on them (and which are not going to be open sourced). I'm setting up workflow for multiple projects at work, and I was wondering how it would be if we took this approach a bit of an extreme instead of having a single monolithic project. I quickly realized there is a potential can of worms in really using sub-modules. Supposing a pair of applications: studio and player, and dependent libraries core, graph and network, where dependencies are as follows: core is standalone graph depends on core (sub-module at ./libs/core) network depdends on core (sub-module at ./libs/core) studio depends on graph and network (sub-modules at ./libs/graph and ./libs/network) player depends on graph and network (sub-modules at ./libs/graph and ./libs/network) Suppose that we're using CMake and that each of these projects has unit tests and all the works. Each project (including studio and player) must be able to be compiled standalone to perform code metrics, unit testing, etc. The thing is, a recursive git submodule fetch, then you get the following directory structure: studio/ studio/libs/ (sub-module depth: 1) studio/libs/graph/ studio/libs/graph/libs/ (sub-module depth: 2) studio/libs/graph/libs/core/ studio/libs/network/ studio/libs/network/libs/ (sub-module depth: 2) studio/libs/network/libs/core/ Notice that core is cloned twice in the studio project. Aside from this wasting disk space, I have a build system problem because I'm building core twice and I potentially get two different versions of core. Question How do I organize sub-modules so that I get the versioned dependency and standalone build without getting multiple copies of common nested sub-modules? Possible solution If the the library dependency is somewhat of a suggestion (i.e. in a "known to work with version X" or "only version X is officially supported" fashion) and potential dependent applications or libraries are responsible for building with whatever version they like, then I could imagine the following scenario: Have the build system for graph and network tell them where to find core (e.g. via a compiler include path). Define two build targets, "standalone" and "dependency", where "standalone" is based on "dependency" and adds the include path to point to the local core sub-module. Introduce an extra dependency: studio on core. Then, studio builds core, sets the include path to its own copy of the core sub-module, then builds graph and network in "dependency" mode. The resulting folder structure looks like: studio/ studio/libs/ (sub-module depth: 1) studio/libs/core/ studio/libs/graph/ studio/libs/graph/libs/ (empty folder, sub-modules not fetched) studio/libs/network/ studio/libs/network/libs/ (empty folder, sub-modules not fetched) However, this requires some build system magic (I'm pretty confident this can be done with CMake) and a bit of manual work on the part of version updates (updating graph might also require updating core and network to get a compatible version of core in all projects). Any thoughts on this?

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  • Ubuntu on Pandaboard giving me troubles

    - by Jeroen Jacobs
    I'm trying to install the OMAP4 extras for ubuntu on my pandaboard. For some reason, a few packages can't seem to be agree with eachother. This what I did so far: installed on Ubuntu 11.10 on sd card Powered on Pandaboard and let it finish it's initial install Did an "apt-get update" and "apt-get upgrade", to install updates So far, everything went fine, and I was quite happy with my Pandaboard, but then I made the mistake of typing this: apt-get install ubuntu-imap4-extras At first, everything seemed ok, and it started downloading and installing. But then after a while it just crashed. I tried it again but then it gave me this: Reading package lists... Done Building dependency tree Reading state information... Done ubuntu-omap4-extras is already the newest version. You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: gstreamer0.10-openmax : Depends: gstreamer0.10-plugins-bad but it is not going to be installed gstreamer0.10-plugin-ducati : Depends: gstreamer0.10-plugins-bad but it is not going to be installed ubuntu-omap4-extras-multimedia : Depends: gstreamer0.10-plugins-bad (>= 0.10.22-2ubuntu4+ti1.5) but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). So I tried to the suggestion: apt-get -f install: Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following extra packages will be installed: gstreamer0.10-plugins-bad The following NEW packages will be installed: gstreamer0.10-plugins-bad 0 upgraded, 1 newly installed, 0 to remove and 4 not upgraded. 88 not fully installed or removed. Need to get 0 B/1,794 kB of archives. After this operation, 4,571 kB of additional disk space will be used. Do you want to continue [Y/n]? y (Reading database ... 143575 files and directories currently installed.) Unpacking gstreamer0.10-plugins-bad (from .../gstreamer0.10-plugins bad_0.10.22-2ubuntu4+ti1.5.4.8+1_armel.deb) ... dpkg: error processing /var/cache/apt/archives/gstreamer0.10-plugins-bad_0.10.22-2ubuntu4+ti1.5.4.8+1_armel.deb (--unpack): trying to overwrite '/usr/lib/libgstbasecamerabinsrc-0.10.so.0.0.0', which is also in package gstreamer0.10-plugins-good 0.10.30-1ubuntu7.1 dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Errors were encountered while processing: /var/cache/apt/archives/gstreamer0.10-plugins-bad_0.10.22-2ubuntu4+ti1.5.4.8+1_armel.deb E: Sub-process /usr/bin/dpkg returned an error code (1) Seems like two packages (plugins-good and plugins-bad) are fighting over the same library. Any idea on how to fix this??

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  • Desktop Fun: Runic Style Fonts

    - by Asian Angel
    Most of the time regular fonts are just what you need for documents, invitations, or adding text to images. But what if you are in the mood for something unusual or unique to add that perfect touch? If you like older runic style writing, then enjoy finding some new favorites for your collection with our Runic Style Fonts collection. Temple photo by ShinyShiny. Note: To manage the fonts on your Windows 7, Vista, & XP systems see our article here. The Runic Style Fonts Sable Download Worn Manuscript Download JSL Ancient Download Antropos Download Cave Gyrl Download The Roman Runes Alliance Download Ancient Geek Download Troll Download Runish Quill MK *includes two font types Download DS RUNEnglish 2 Download Runes Written *includes two font types Download Wolves And Ravens Download Art Greco Download Dalek Download Glagolitic AOE Download Linear B Download Cartouche Download Greywolf Glyphs *includes 62 individual characters Note: This group represents A – Z in all capital letters. Note: This group represents A – Z in all lower case letters. Note: This group represents the numbers 0 – 9. Download Africain *includes 62 individual characters Note: This group represents A – Z in all capital letters. Note: This group represents A – Z in all lower case letters. Note: This group represents the numbers 0 – 9. Download Cave Writings *includes 52 individual characters Note: This group represents A – Z in all capital letters. Note: This group represents A – Z in all lower case letters. Download For more great ways to customize your computer be certain to look through our Desktop Fun section. Latest Features How-To Geek ETC HTG Projects: How to Create Your Own Custom Papercraft Toy How to Combine Rescue Disks to Create the Ultimate Windows Repair Disk What is Camera Raw, and Why Would a Professional Prefer it to JPG? The How-To Geek Guide to Audio Editing: The Basics How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 Five Sleek Audi R8 Car Themes for Chrome and Iron MS Notepad Replacement Metapad Returns with a New Beta Version Spybot Search and Destroy Now Available as a Portable App (PortableApps.com) ShapeShifter: What Are Dreams? [Video] This Computer Runs on Geek Power Wallpaper Bones, Clocks, and Counters; A Look at the First 35,000 Years of Computing

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  • Ubuntu Dual Screen Using Virtual Machine - AMD GPU

    - by Chris
    I've been searching online and reading tutorials and etc about how to make my ubuntu VM dual screen(x86_64). I have first tried to run these commands: sudo aticonfig --initial -f which gave me the ouput of: sudo: aitconfig: command not found I then googled the output and followed these instructions that I tells me to install my ATI drivers onto my ubuntu. wget http://www2.ati.com/drivers/linux/ati-driver-installer-11-5-x86.x86_64.run sudo sh ati-driver-installer-11-5-x86.x86_64.run --buildpkg Ubuntu/natty sudo dpkg -i *.deb sudo apt-get -f install sudo aticonfig -f --initial --adapter=all sudo reboot It all works well until I input sudo apt-get -f install which gives me the following output: sudo apt-get -f install Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 25 not upgraded. 3 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Setting up fglrx (2:8.850-0ubuntu1) ... update-alternatives: error: alternative link /usr/bin/aticonfig is already managed by x86_64-linux-gnu_gl_conf. dpkg: error processing fglrx (--configure): subprocess installed post-installation script returned error exit status 2 dpkg: dependency problems prevent configuration of fglrx-amdcccle: fglrx-amdcccle depends on fglrx; however: Package fglrx is not configured yet. dpkg: error processing fglrx-amdcccle (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of fglrx-dev: fglrx-dev depends on fglrx; however: Package fglrx is not configured yet. dpkg: error processing fglrx-dev (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: fglrx fglrx-amdcccle fglrx-dev E: Sub-process /usr/bin/dpkg returned an error code (1) At this point, I don't know what to do since running: gksudo amdcccle For the record, I have 3D acceleration turned on. The following is my GPU for my VM lspci | grep VGA 00:02.0 VGA compatible controller: InnoTek Systemberatung GmbH VirtualBox Graphics Adapter Any Help on how I can make my VM dual screen with Ubuntu would be great. Thank you in advance.

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  • Move Data into the grid for scalable, predictable response times

    - by JuergenKress
    CloudTran is pleased to introduce the availability of the CloudTran Transaction and Persistence Manager for creating scalable, reliable data services on the Oracle Coherence In-Memory Data Grid (IMDG). Use of IMDG architectures has been key to handling today’s web-scale loads because it eliminates database latency by storing important and frequently access data in memory instead of on disk. The CloudTran product lets developers easily use an IMDG for full ACID-compliant transactions without having to be concerned about the location or spread of data. The system has its own implementation of fast, scalable distributed transactions that does NOT depend on XA protocols but still guarantees all ACID properties. Plus, CloudTran asynchronously replicates data going into the IMDG to back-end datastores and back-up data centers, again ensuring ACID properties. CloudTran can be accessed through Java Persistence API (JPA via TopLink Grid) and now, through a new Low-Level API, or LLAPI. This is ideal for use in SOA applications that need data reliability, high availability, performance, and scalability. It is still in its limited beta release, the LLAPI gives developers the ability to use standard put/remove logic available in Coherence and then wrap logic with simple Spring annotations or XML+AspectJ to start transactions. An important feature of LLAPI is the ability to join transactions. This is a common outcome for SOA applications that need to reduce network traffic by aggregating data into single cache entries and then doing SOA service processing in the node holding the data. This results in the need to orchestrate transaction processing across multiple service calls. CloudTran has the capability to handle these “multi-client” transactions at speed with no loss in ACID properties. Developing software around an IMDG like Oracle Coherence is an important choice for today’s web-scale applications and services. But this introduces new architectural considerations to maintain scalability in light of increased network loads and data movement. Without using CloudTran, developers are faced with an incredibly difficult task to ensure data reliability, availability, performance, and scalability when working with an IMDG. Working with highly distributed data that is entirely volatile while stored in memory presents numerous edge cases where failures can result in data loss. The CloudTran product takes care of all of this, leaving developers with the confidence and peace of mind that all data is processed correctly. For those interested in evaluating the CloudTran product and IMDGs, take a look at this link for more information: http://www.CloudTran.com/downloadAPI.ph , or send your questions to [email protected]. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit  www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Technorati Tags: CloudTran,data grid,M,SOA Community,Oracle SOA,Oracle BPM,BPM,Community,OPN,Jürgen Kress

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  • "sr0" I/O read boot error in Xubuntu 12.10

    - by Entropicurity
    Just recently upgraded Xubuntu 12.10 after having installed 12.04 originally. Ever since that happened, any time I inserted a disk into my DVD/CD reader/writer I would end up getting a number of error messages from my DVD player/Audio player softer, typically with any of them either crashing or returning a GStreamer backend error. So doing some research I tried to mount it manually, and it typically returned the error messages you'll see below: (using the dmesg | grep "sr0" command) [17545.435584] end_request: I/O error, dev sr0, sector 0 [17545.492968] sr 3:0:0:0: >[sr0] [17545.492981] sr 3:0:0:0: >[sr0] [17545.492992] sr 3:0:0:0: >[sr0] [17545.493003] sr 3:0:0:0: >[sr0] CDB: [17545.493020] end_request: I/O error, dev sr0, sector 0 [17545.493058] EXT3-fs (sr0): error: unable to read superblock [17545.553224] sr 3:0:0:0: >[sr0] [17545.553237] sr 3:0:0:0: >[sr0] [17545.553247] sr 3:0:0:0: >[sr0] [17545.553258] sr 3:0:0:0: >[sr0] CDB: [17545.553275] end_request: I/O error, dev sr0, sector 0 [17545.553312] EXT4-fs (sr0): unable to read superblock [17545.611482] sr 3:0:0:0: >[sr0] [17545.611494] sr 3:0:0:0: >[sr0] [17545.611504] sr 3:0:0:0: >[sr0] [17545.611514] sr 3:0:0:0: >[sr0] CDB: [17545.611531] end_request: I/O error, dev sr0, sector 0 [17545.611568] FAT-fs (sr0): unable to read boot sector When I grepped this, the number of error messages just seemed to spill all over the screen, and typically all revolve around the I/O error. I then went into VLC and tried to run the stuff through there, but for some reason it won't read with the default devices. Instead I have to manually input sr0 into each of the /dev/ references and it will play just fine, until I exit out of the program, at which point I have to re-input everything. I have already installed all the media dependencies, both open source and restricted, through the software center. I just found this strange, as out of the box 12.04 there wasn't any problem what so ever. At this point, it could be that all my audio CD's are not in a format that is familiar with the OS (I've read in some places that EXTF4 has issues with this) but I don't see how that could be a problem when the above error messages even tested to see if it is EXT3 as well? I've tried my best to troubleshoot this up till now using existing topics, but it seems that this is a regular problem with a multitude of varying factors that incorporate into it, including but not limited to read/write problems with the format of the CD and right protection. Is there something integral that I am missing?

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  • Chargeback and showback...both a 'throw back'

    - by llaszews
    Been getting asked again by customers and partners about chargeback and showback in the cloud so thought I would blog on my response to this question. Charge Back background, information and industry analysis: Cloud computing is all about shared resources. These shared resources are computer servers (including memory and CPU), network devices, hard disk storage, database servers, application servers, cooling, floor space, electricity and more. These resources are shared by departments within a company, or by a number of companies, when resources are hosted in the public or hybrid cloud. Currently, hosting providers that run other companies on their cloud platforms do not have an accurate way to measure the shared computing resources used by a specific user let alone used by a specific customer. Additionally, companies running their own cloud data centers, for private or hybrid clouds, have no way of measure and charging back the departments in the company that are using these shared cloud resources. In both cases, the lack of determine shared resource costs and to charge them back to the company, department or user that is using this resources is limited a clear measure of business benefit and impacting company’s ability to measure the Return on Investment (ROI). An IT chargeback system is an accounting strategy that applies the costs of IT services, hardware or software to the business unit in which they are used. This system contrasts with traditional IT accounting models in which a centralized department bears all of the IT costs in an organization and those costs are treated simply as corporate overhead. Showback involves showing the IT costs to a department or customer but not actually charging them for their IT usage. Showback is a gradual method of introducing chargeback into an enterprise. Most companies implement a show back mechanism before a full chargeback system is put in place. Oracle chargeback product: Oracle Enterprise Manager provides tools for defining detailed Chargeback plans spanning different metrics collected for each type of resources as well as defining Cost Centers for grouping costs across multiple developers. Chargeback plans can use not only usage based costs, but also configuration based costs (e.g. version of the platform) or fixed costs (e.g. flat-rate management fee). Chargeback has rich out of the box reports. Trending reports show how charge and resource consumption varies over time, while Summary reports show the breakdown of charges or usage by different dimensions such as Cost Center or Target Type. These reports help consumers in understanding how their charges relate to their consumption and also assist the IT department with budgeting and planning activities. With BI Publisher, the reports can be made available in a variety of formats such as PDF, HTML, Word, Excel or PowerPoint.

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  • PowerShell - grabbing values out of the registry and running them

    - by Rob Farley
    So I closed an application that runs when Windows starts up, but it doesn’t have a Start Menu entry, and I was trying to find it. Ok, I could’ve run regedit.exe, navigated through the tree and found the list of things that run when Windows starts up, but I thought I’d use PowerShell instead. PowerShell presents the registry as if it’s a volume on a disk, and you can navigate around it using commands like cd and dir. It wasn’t hard to find the folder I knew I was after – tab completion (starting the word and then hitting the Tab key) was a friend here. But unfortunately dir doesn’t list values, only subkeys (which look like folders). PS C:\Windows\system32> dir HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run PS C:\Windows\system32> Instead, I needed to use Get-Item to fetch the ‘Run’ key, and use its Property property. This listed the values in there for me, as an array of strings (I could work this out using Get-Member). PS C:\Windows\system32> (Get-Item HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run).Property QuickSet SynTPEnh Zune Launcher PS C:\Windows\system32> Ok, so the thing I wanted wasn’t in there (an app called PureText, whicih lets me Paste As Text using Windows+V). That’s ok – a simple change to use HKCU instead of HKLM (Current User instead of Local Machine), and I found it. Now to fetch the details of the application itself, using the RegistryKey method GetValue PS C:\Windows\system32> (Get-Item HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run).GetValue('PureText') "C:\Users\Rob\Utilities\PureText.exe" PS C:\Windows\system32> And finally, surrounding it in a bit of code to execute that command. That needs an ampersand and the Invoke-Expression cmdlet. PS C:\Windows\system32> '& ' + (Get-Item HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run).GetValue('PureText') | Invoke-Expression A simple bit of exploring PowerShell which will makes for a much easier way of finding and running those apps which start with Windows.

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  • Desktop Fun: Vacation and Travel Icon Packs

    - by Asian Angel
    Do you have an upcoming vacation, place that you would like to travel to, or a favorite destination that you have visited in the past? With an appropriate wallpaper you can help set the mood for your desktop with our Vacation and Travel Icon Packs collection. Note: To customize the icon setup on your Windows 7 & Vista systems see our article here. Using Windows XP? We have you covered here. Sneak Preview After seeing “Tiki Time! 1.0” set shown below we just could not resist putting together a nice sunset beach desktop as an example to share with you. That is definitely so relaxing to look at… Note: Wallpaper can be found here. Looking very nice close up… At the Beach *.ico format only Download Sea Shells *.ico format only Download Beach Icon Collection *.ico and .png format Download Tiki Time! 1.0 *.ico format only Download Underwater Icons *.ico format only Download Shutter Shades Icon Pack *.ico and .png format Download Life Saver *.ico format only Download Les 12 Maisons *.ico format only Download Back In Time *.ico format only Download Tourism *.ico and .png format Download The Lovely Bones *.ico format only Download Japanicons Pack *.ico and .png format, also has bonus wallpaper included! Here is what the included 1280*1024 wallpaper looks like. Download Ukrainian Motifs *.ico format only Download Las Vegas Icons *.ico format only Download Las Vegas 2 *.ico format only Download Be sure to visit our new Desktop Fun section for more customization goodness! Similar Articles Productive Geek Tips Desktop Fun: Video Game Icon PacksDesktop Fun: Sci-Fi Icons Packs Series 2Restore Missing Desktop Icons in Windows 7 or VistaAdd Home Directory Icon to the Desktop in Windows 7 or VistaQuick Help: Downloadable Show Desktop Icon for XP TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips VMware Workstation 7 Acronis Online Backup DVDFab 6 Revo Uninstaller Pro Hyperwords addon (Firefox) Backup Outlook 2010 Daily Motivator (Firefox) FetchMp3 Can Download Videos & Convert Them to Mp3 Use Flixtime To Create Video Slideshows Creating a Password Reset Disk in Windows

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  • OBIA on Teradata - Part 2 Teradata DB Utilization for ETL

    - by Mohan Ramanuja
    Techniques to Monitor Queries and ETL Load CPU and Disk I/OSelect username, processor, sum(cputime), sum(diskio) from dbc.ampusage where processor ='1-0' order by 2,3 descgroup by 1,2;UserName    Vproc    Sum(CpuTime)    Sum(DiskIO)AC00916        10    6.71            24975 List Hardware ErrorsThere is a possibility that the system might have adequate disk space but out of free cylinders. In order to monitor hardware errors, the following query was used:Select * from dbc.Software_Event_Log where Text like '%restart%' order by thedate, thetime;For active users, usage of CPU and analysis of bad CPU to I/O ratiosSelect * from DBC.AMPUSAGE where username='CRMSTGC_DEV_ID';  AND SUBSTR(ACCOUNTNAME,6,3)='006'; Usage By I/OSelect AccountName, UserName, sum(CpuTime), sum(DiskIO)  from DBC.AMPUSAGE group by AccountName, UserName Order by Sum(DiskIO) desc; AccountName                       UserName                          Sum(CpuTime)  Sum(DiskIO)$M1$10062209                      AB89487                           374628.612    7821847$M1$10062210                      AB89487                           186692.244    2799412$M1$10062213                      COC_ETL_ID                        119531.068    331100426$M1$10062200                      AB63472                           118973.316    109881984$M1$10062204                      AB63472                           110825.356    94666986$M1$10062201                      AB63472                           110797.976    75016994$M1$10062202                      AC06936                           100924.448    407839702$M1$10062204                      AB67963                           0         4$M1$10062207                      AB91990                           0         2$M1$10062208                      AB63461                           0         24$M1$10062211                      AB84332                           0         6$M1$10062214                      AB65484                           0         8$M1$10062205                      AB77529                           0         58$M1$10062210                      AC04768                           0         36$M1$10062206                      AB54940                           0         22 Usage By CPUSelect AccountName, UserName, sum(CpuTime), sum(DiskIO)  from DBC.AMPUSAGE group by AccountName, UserName Order by Sum(CpuTime) desc;AccountName                       UserName                          Sum(CpuTime)  Sum(DiskIO)$M1$10062209                      AB89487                           374628.612    7821847$M1$10062210                      AB89487                           186692.244    2799412$M1$10062213                      COC_ETL_ID                        119531.068    331100426$M1$10062200                      AB63472                           118973.316    109881984$M1$10062204                      AB63472                           110825.356    94666986$M1$10062201                      AB63472                           110797.976    75016994$M2$100622105813004760047LOAD     T23_ETLPROC_ENT                   0 6$M1$10062215                      AA37720                           0     180$M1$10062209                      AB81670                           0     6Select count(distinct vproc) from dbc.ampusage;432select * from dbc.dbcinfo;AccountName     UserName     CpuTime DiskIO  CpuTimeNorm         Vproc VprocType    Model$M1$10062205                      CRM_STGC_DEV_ID                   0.32    1764    12.7423999023438    0     AMP      2580$M1$10062205                      CRM_STGC_DEV_ID                   0.28    1730    11.1495999145508    3     AMP      2580$M1$10062205                      CRM_STGC_DEV_ID                   0.304    1736    12.1052799072266    4    AMP      2580$M1$10062205                      CRM_STGC_DEV_ID                   0.248    1731    9.87535992431641    7    AMP      2580$M1$10062205                      CRM_STGC_DEV_ID                   0.332    1731    13.2202398986816    8    AMP      2580$M1$10062205                      CRM_STGC_DEV_ID                   0.284    1712    11.3088799133301    11   AMP      2580$M1$10062205                      CRM_STGC_DEV_ID                   0.24    1757    9.55679992675781    12    AMP      2580$M1$10062205                      CRM_STGC_DEV_ID                   0.292    1737    11.6274399108887    15   AMP      2580$M1$10062205                      CRM_STGC_DEV_ID                   0.268    1753    10.6717599182129    16   AMP      2580$M1$10062205                      CRM_STGC_DEV_ID                   0.276    1732    10.9903199157715    19   AMP      2580select * from dbc.dbcinfo;InfoKey    InfoDataLANGUAGE   SUPPORT           MODE    StandardRELEASE    12.00.03.03VERSION    12.00.03.01a

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  • Computer Networks UNISA - Chap 15 &ndash; Network Management

    - by MarkPearl
    After reading this section you should be able to Understand network management and the importance of documentation, baseline measurements, policies, and regulations to assess and maintain a network’s health. Manage a network’s performance using SNMP-based network management software, system and event logs, and traffic-shaping techniques Identify the reasons for and elements of an asset managements system Plan and follow regular hardware and software maintenance routines Fundamentals of Network Management Network management refers to the assessment, monitoring, and maintenance of all aspects of a network including checking for hardware faults, ensuring high QoS, maintaining records of network assets, etc. Scope of network management differs depending on the size and requirements of the network. All sub topics of network management share the goals of enhancing the efficiency and performance while preventing costly downtime or loss. Documentation The way documentation is stored may vary, but to adequately manage a network one should at least record the following… Physical topology (types of LAN and WAN topologies – ring, star, hybrid) Access method (does it use Ethernet 802.3, token ring, etc.) Protocols Devices (Switches, routers, etc) Operating Systems Applications Configurations (What version of operating system and config files for serve / client software) Baseline Measurements A baseline is a report of the network’s current state of operation. Baseline measurements might include the utilization rate for your network backbone, number of users logged on per day, etc. Baseline measurements allow you to compare future performance increases or decreases caused by network changes or events with past network performance. Obtaining baseline measurements is the only way to know for certain whether a pattern of usage has changed, or whether a network upgrade has made a difference. There are various tools available for measuring baseline performance on a network. Policies, Procedures, and Regulations Following rules helps limit chaos, confusion, and possibly downtime. The following policies and procedures and regulations make for sound network management. Media installations and management (includes designing physical layout of cable, etc.) Network addressing policies (includes choosing and applying a an addressing scheme) Resource sharing and naming conventions (includes rules for logon ID’s) Security related policies Troubleshooting procedures Backup and disaster recovery procedures In addition to internal policies, a network manager must consider external regulatory rules. Fault and Performance Management After documenting every aspect of your network and following policies and best practices, you are ready to asses you networks status on an on going basis. This process includes both performance management and fault management. Network Management Software To accomplish both fault and performance management, organizations often use enterprise-wide network management software. There various software packages that do this, each collect data from multiple networked devices at regular intervals, in a process called polling. Each managed device runs a network management agent. So as not to affect the performance of a device while collecting information, agents do not demand significant processing resources. The definition of a managed devices and their data are collected in a MIB (Management Information Base). Agents communicate information about managed devices via any of several application layer protocols. On modern networks most agents use SNMP which is part of the TCP/IP suite and typically runs over UDP on port 161. Because of the flexibility and sophisticated network management applications are a challenge to configure and fine-tune. One needs to be careful to only collect relevant information and not cause performance issues (i.e. pinging a device every 5 seconds can be a problem with thousands of devices). MRTG (Multi Router Traffic Grapher) is a simple command line utility that uses SNMP to poll devices and collects data in a log file. MRTG can be used with Windows, UNIX and Linux. System and Event Logs Virtually every condition recognized by an operating system can be recorded. This is typically done using event logs. In Windows there is a GUI event log viewer. Similar information is recorded in UNIX and Linux in a system log. Much of the information collected in event logs and syslog files does not point to a problem, even if it is marked with a warning so it is important to filter your logs appropriately to reduce the noise. Traffic Shaping When a network must handle high volumes of network traffic, users benefit from performance management technique called traffic shaping. Traffic shaping involves manipulating certain characteristics of packets, data streams, or connections to manage the type and amount of traffic traversing a network or interface at any moment. Its goals are to assure timely delivery of the most important traffic while offering the best possible performance for all users. Several types of traffic prioritization exist including prioritizing traffic according to any of the following characteristics… Protocol IP address User group DiffServr VLAN tag in a Data Link layer frame Service or application Caching In addition to traffic shaping, a network or host might use caching to improve performance. Caching is the local storage of frequently needed files that would otherwise be obtained from an external source. By keeping files close to the requester, caching allows the user to access those files quickly. The most common type of caching is Web caching, in which Web pages are stored locally. To an ISP, caching is much more than just convenience. It prevents a significant volume of WAN traffic, thus improving performance and saving money. Asset Management Another key component in managing networks is identifying and tracking its hardware. This is called asset management. The first step to asset management is to take an inventory of each node on the network. You will also want to keep records of every piece of software purchased by your organization. Asset management simplifies maintaining and upgrading the network chiefly because you know what the system includes. In addition, asset management provides network administrators with information about the costs and benefits of certain types of hardware or software. Change Management Networks are always in a stage of flux with various aspects including… Software changes and patches Client Upgrades Shared Application Upgrades NOS Upgrades Hardware and Physical Plant Changes Cabling Upgrades Backbone Upgrades For a detailed explanation on each of these read the textbook (Page 750 – 761)

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